package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@Slf4j
@RequestMapping("common")
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("upload")
    public R<String> upload(MultipartFile file) throws Exception {
        //获取文件名
        String originalFilename = file.getOriginalFilename();
        //截取文件名后缀
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //得到一个UUID文件名
        String fileName = UUID.randomUUID().toString() + suffix;
        //判断该文件夹是否存在，不存在就创建该文件夹
        File file1 = new File(basePath);
        if (!file1.exists()) {
            file1.mkdirs();
        }
        //将文件转存到一个文件夹中
        file.transferTo(new File(basePath + fileName));
        return R.success(fileName);
    }

    @GetMapping("download")
    public void download(String name, HttpServletResponse response) throws Exception {
        //读取该文件夹内容
        FileInputStream inputStream = new FileInputStream(basePath + name);
        //创建写出流
        ServletOutputStream outputStream = response.getOutputStream();
        //使用工具类进行读取和写出的转移
        IOUtils.copy(inputStream, outputStream);

    }
}
